Shock absorber



J. O. GILL SHOCK ABSORBER Feb. 23, 1954 Filed Nov. 29, 1949 INVENTOI}. .6 z'ZZ Patented Feb. 23, 1954 UNI TED STATE-S 2,670,164 I SHOCK momma John' flf-Gill,Barnesboro fla. emiplicationflomnber 295 1949, i'ei-tal ltl'olflflfl "This invention-relates 'to -.shock absorbersand relation 'more particularlytoa dev'icerofthis *kindto'b'e; used ontrailing power cables in 'coal mines and it is an object of the invention to provide a device of this kind to relieve the strain on the cables when pulled tightly by car, machine, locomotive and the like.

Furthermore it is an object to provide a strong snubber to hold a cable without breaking the cable through the medium of a spring to absorb shock and to ease the load on the cable.

The invention also has for an object to provide a device of this kind which may be effectively used as an anchor for the dead end of a cable.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved shock absorbers whereby certain advantages are attained, as will be hereinafter more fully set forth.

In order that my invention may be better understood, I will now proceed to describe the same with reference to the accompanying drawing, wherein:

Figure 1 is a view in top plan of a shock absorber constructed in bodiment of the invention; an associated cable being shown in fragment;

Figure 2 is a view partly in side elevation and partly in section of the device as illustrated in Figure 1, the section being taken substantially on the line 22 of Figure 1; and

Figure 3 is a sectional view taken substantialon the line 3-3 of Figure 2.

In the embodiment of the invention as illustrated in the accompanying drawing denotes an elongated tubular casing closed at one end and open at its opposite end. The closed end of the casing C is provided with an outstanding ear I provided with an opening 2 whereby means are provided for securing the casing to the roof or other part of a mine car or the like and permit the device to be used advantageously as an anchor for the dead end of a cable A.

Extending Within the casing C through the open end thereof is an elongated rod or shank 3 which is also freely disposed through an opening 4 at the axial center of a cap 5 threaded upon or otherwise detachably engaged with the open end portion of the casing C. The outer end of the rod or shank 3 at all times extends outwardly beyond the cap 5 when the various parts of the device are assembled.

Threading upon the inserted end portion of the rod or shank 3 is a head or nut 8 locked on accordance with an emthrough the ron ror sshank 3 outwardly r df i the applied heaidor mit 6. Inwardly df theamiilied head or mlt 6, the rod-or shank -a' is freely sinv rounded by a disk or washer 8 of a diameter substantially equal to the internal diameter of the casing C and thus serve as a support for the inserted end portion of the rod or shank 3 to prevent the same from wobbling. The disk or washer 8 also serves as an abutment for the inserted end of an expansible member 9 the opposite end of which abutting the applied cap 5. As herein comprised the expansible member 9 being herein disclosed as a coil spring encircles the portion of the rod or shank 3 Within the casing C. This expansible member or spring 9 serves to impose a pull or strain of the cable A operatively engaged with the outer extended portion of the rod or shank 9 and also to snub or absorb the shocks imposed upon the cable A and thus reduce to a minimum the liability of breakage of the cable.

The outer extended portion of the rod or shank 3 is provided with a fiat head I 0 which is disposed between corresponding end portions of the short links I I and pivotally connected thereto as at It.

The cable clamp comprises two substantially duplicate sections B arranged side by side and held in assembled relation by the removable bolts [4 with each of which is associated the usual holding and clamping nut l5.

Each of the sections B comprises a semi-cylindrical arcuate member l6 of substantially a quarter circle and of predetermined radius. These sections l6 receive therebetween the dead end or outer portion of the cable A and are stamped thereto by the bolts l4 and nuts l5. Certain of the bolts M are disposed between the opposite end portions of the flanges I! extend-- ing along the out how or back portions of the sections I6 and immediately along the outer bow margins of the sections other of the bolts H are directed through the ears I8 extending outwardly from the inbcw ends of the sections I immediately adjacent to the free edges of the sections.

The central portions of vided with the outwardly disposed ears l9 which are received between the outer end portions of the links H and pivotally held thereto by the headed pin 20 which is held against displacement by the cotter pin 2| or otherwise as desired.

From the foregoing it is believed to be readily apparent that the device as herein disclosed is the flanges I1 are proof particular advantage for trailing cables as used in and about coal mines. The links H give flexibility to the device to assure the maintenance of alignment with a shuttle car or the like and thus substantially avoiding damage to the cable.

It is also to be pointed out that by having the clamp circular, the cable is effectively protected at the bend and held from slipping. The circular or curved clamp holds the cable tight and lets the loose end a curve down to the usual fuse box or switch.

I claim:

A shock absorber support for a cable, including a spring tensioned rod, a clamp formed of two substantially duplicate quarter-circular sections, each section being of semi-circular cross sectional form, apertured ears spaced along the concave side edge of each of said sections, an apertured flange formed along the convex side edge of each of said sections, said flanges and ears of the sections being in side by side relation, bolts engaged in the said apertures of said ears and flanges, each of said flanges being formed with an outwardly directed circular extension substantially midway between the ends of said sections and spaced parallel links piv otally connecting an end of said rod with the circular extensions of said flanges, said cable being clamped between said quarter circular sections and said rod being disposed in line with one run of the cable so that strain on the said one cable run is resisted by the rod tensioning spring.

JOHN O. GILL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,884,036 Malone Oct. 25, 1932 2,149,875 Talbott Mar. 7, 1939 2,159,870 Wert May 23, 1939 2,237,597 Fisher Apr. 8, 1941 2,335,333 Wood Nov. 30, 1943 2,390,192 St. Clair Dec. 4, 1945 2,439,067 Wood Apr. 6, 1948 

